When the strong attack the weak, both sides having firearms make the fight much more fair than if both sides were armed with sticks and rocks.
Endocrinationbwas well done along centuries. I, for myself don't want war. And as you may observe, all wars are strategicaly done, far away from the countries that found them...so ai don't see who are the week that needs to be defended form the strongest..... And I doubt that the majority of population on earth, want to have weapons to fight their fellow humans.